Separating-machine



(No Model.) 2 lSheets--Sheet 1. J. G. MUNDY. SEPARATING MGHINB. No. 465,582. Patented Dec. 22, 1891.

(No Model.) 2 Sheets-Sheet 2."

J. G. MUNDY. SEPARATING MAGHINB.

No. 465,582. Paten-ted Dec. 22,1891.

UNITED STATES PATENT OFFICE.

JOHN G. MUNDY, OF JACKSON, MICHIGAN.

SEPARATINGuMACHINE.

SPECIFICATION forming part of Letters Patent No. 465,582, dated December 22, 1891.

Application filed May 15,1891. Serial No. 392,927. (No model.)

To LZZ whom t may concern:

Be it known that I, JOHN G. MUNDY, a citi- Zen of the United States,`residing at Jackson,

in the county of Jackson and State of Michigan, have invented new and useful Improvements in Separating-Machines, of which the following is a specification.

' passage by which the air which has been freed This invention relates to that class of separating-.machines which combine an aspiratin g-ohamber, in which the material is purified by ai r-currents, with a dust-collector, in which the dust is separated from the air bythe whirling motion of the dust and air, and a returni which may be used for other purposes.

'In the accompanyingi drawings,consisting of two sheets, Figure l is a longitudinal sectional elevation of my improved separatingmachine. Fig. 2 is a front elevation thereof. Fig. 3 is a cross-section in line a: 03, Fig. l. Fig. 4 is a longitudinal sectional elevation showing a modified construction of the inachine. Fig. 5 is a front elevation thereof. Fig. 6 is a cross-section in line fy y, Fig. 4.

Like letters ofV reference refer to like parts in the several figures.

A represents the aspirating-chamber, forming the front portion of the machine and provided at its top with a feed-spout a, through which the material to be separated is introduced into the machine.

b represents a shaking feed-board arranged underneath the feed-spout, and b an automatic feed-gate whereby the material is discharged in a thin stream.

C represents overlapping inclined shelves or cant-boards arranged within the aspirating-chamber near the front wall c thereof and underneath the feed-board, so that the material iiows successively over these boards and drops finally upon the front Wall d of a hopper D, which is provided with a trapped discharge-spout CZ. The cant-boards are separated by air-passages and the strength of the air-currents is regulated by a valve e, which is hinged to the upper end of the rear wall d2 of the hopper D. This rear wall is arranged at a suitable distance in front of the rear wall c of the aspirating-chamber, so as to form a cut-off hopper F between these two walls, which hopper is provided with a trapped discharge-spout f.-

G represents the d ust-collecting chamber,

'which is arranged in rear of the aspiratingchamber and which communicates therewith by an opening g, arranged centrally with reference to the dust-collecting chamber in the rear wall of the aspirating-charnber.

II represents fan-blades arranged within the dust-collecting chamber vin rear of the opening g, so as to draw the air through the aspirating-chamber and drive it into the dustcollecting chamber with a whirling motion.

7L represents a shield or disk arranged in rear of the fan-blades and extendingV outwardly beyond the fan-blades, so as to operate as a casing for the same, which compels the air to pass between the fan-blades before it can escape into the dust-collecting chamber.

'L' represents the shaft .to which the fanblades are secured, and which extends through the front wallof the aspirating-chamber.

I represents the driving-pulley secured to the front end of the fan-shaft, and j an eccentric secured to the shaft behind the pulley and driving theshaking feed-board by means of a lever j. The fan-shaft passes through the shield h, and the latter is either secured to the shaft to rotate therewith or is stationary, as may be preferred.

7c represents the im perforate peripheral wall of the dust-collecting chamber, which is circular in cross-section and tapers rearwardly, so that the fan is arranged in the large portion of the dust-collecting chamber.

7f3 represents the trapped discharge-spout for the heavy dust, communicating with the large end of the dust-collecting chamber.

L is a hood which surrounds the open small end of the dust-collecting chamber, and Zthe trapped discharge-spout which discharges the dust therefrom.

M is the dischargc-tube for the air, arranged axiallyin the small end of the dust-collecting chamber, and 'm is a return-spout connecting this tube with the lower portion of the aspirating-chamber. The return-spout may com- IOO municate with the discharge'spout Z by an opening Z', through which any eXcess of airpressure in the discharge-spout is delivered into the return-spout m.

When the machine is used for purifying middlings, the operation is as follows: The mid dlings falling from the shaking feed-board in a thin stream pass successively over the cant-boardsin the aspirating-chamber and are subjected to the action ot' the air-currents in passing from one cant-board to the other. These air-currents remove the light material, fluff, dust, &c., While the heavy middlings drop through the air-currents and are discharged throughthespoutd. Theair-current,charged with the light material, passes over the top of the valve e and descends into the cut-01T hopper F, in Which the sharp or granular material is deposited, While the dust-laden aircurrent passes through the opening g to thel fan. The separated sharp material, consisting of lightmiddlings, is discharged from the cutoff hopper through the spout f. The dustladen air-current is set in a whirling motion in the dust-collecting chamber by the fan, whereby the dust is separated from the air, the heavy dust being discharged through the spout 7c at the large end of the dust-collecting chamber and the light dust through the spoutl at the small end. The air escapes from the small end of the dust-collecting chamber and is returned by the spout m to the bottom of the aspirating-chamber, so that no air is discharged from the machine, but a continuous circulation is maintained Within the same. The middlings which are fed to the machine need not be closely graded as to size, because the machine Will separate the different grades, the heaviest going to the spout d of the aspirating-chamber, the next lightest grade to the spout f of the cut-off hopper, the next lightest to the spout k at the large end of the dust-collecting chamber, and only the finest and lightest dust to the spout Z at the small end of the dust-collecting chamber.

In the modied construction represented in O, which is arranged in the rear Wall of the aspirating-chamber around the tube n, and which may be provided with a short tube projecting into the dust-collecting chamber. The sm all end et the dust-collecting chamber may be provided with a central air-tube p, which communicates With the discharge-spout Z by an opening q, through which any excess ot air-pressure in the discharge-spout is delivered into the central portion of the dustcollecting chamber.

I claim as my invention" The combination, with the aspirating-chamber provided with a feeder at its top and a discharge for lthe heavy material at its bottom, of a tapering dust-collecting chamber arranged in rear of the aspirating-chamber, a suction-passage leading from the aspirating chamber into the dust-collecting chamber, a fan arranged Within the dust-collecting chamber and having its eye connected with said suction-passage and its air-discharge arranged to cause the air to whirl in the dustcollecting chamber, and a return-passage connecting the air-outlet of the dust-collecting chamber with the air-inlet of the aspiratin gchamber, substantially as set forth.

Witness my hand this 11th day of May,

lvitnesses:

ORVILLE M. MORSE, SAM H. CAMP. 

